问答题

#includevoid sub(int x,int y,int z){ z=y-x;}int main(){ int a,b,c; sub(10,5,&a); sub(7,a,&b); sub(a,b,&c); printf("%d,%d,%d",a,b,c); return 0;}
该程序的输出结果为_________________

答案： -5,-12,-7

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单项选择题

工件坐标系的零点一般设在（）。
A、机床零点
B、换刀点
C、工件的端面
D、卡盘根

不定项选择

‌In the West, modernity began during the Renaissance, about 14th century. In China, however, modernity began with the declining of Qing Dynasty in late 19th century. ‏

A．正确
B．错误